source: trip-planner-front/node_modules/mixin-deep/index.js@ 1ad8e64

Last change on this file since 1ad8e64 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
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1'use strict';
2
3var isExtendable = require('is-extendable');
4var forIn = require('for-in');
5
6function mixinDeep(target, objects) {
7 var len = arguments.length, i = 0;
8 while (++i < len) {
9 var obj = arguments[i];
10 if (isObject(obj)) {
11 forIn(obj, copy, target);
12 }
13 }
14 return target;
15}
16
17/**
18 * Copy properties from the source object to the
19 * target object.
20 *
21 * @param {*} `val`
22 * @param {String} `key`
23 */
24
25function copy(val, key) {
26 if (!isValidKey(key)) {
27 return;
28 }
29
30 var obj = this[key];
31 if (isObject(val) && isObject(obj)) {
32 mixinDeep(obj, val);
33 } else {
34 this[key] = val;
35 }
36}
37
38/**
39 * Returns true if `val` is an object or function.
40 *
41 * @param {any} val
42 * @return {Boolean}
43 */
44
45function isObject(val) {
46 return isExtendable(val) && !Array.isArray(val);
47}
48
49/**
50 * Returns true if `key` is a valid key to use when extending objects.
51 *
52 * @param {String} `key`
53 * @return {Boolean}
54 */
55
56function isValidKey(key) {
57 return key !== '__proto__' && key !== 'constructor' && key !== 'prototype';
58};
59
60/**
61 * Expose `mixinDeep`
62 */
63
64module.exports = mixinDeep;
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